1011201001987 has 8 divisors (see below), whose sum is σ = 1106893312560. Its totient is φ = 916136182560.

The previous prime is 1011201001969. The next prime is 1011201002003. The reversal of 1011201001987 is 7891001021101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011201001987 - 2¹⁹ = 1011200477699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011201001087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156869412 + ... + 156875857.

It is an arithmetic number, because the mean of its divisors is an integer number (138361664070).

Almost surely, 2^{1011201001987} is an apocalyptic number.

1011201001987 is a deficient number, since it is larger than the sum of its proper divisors (95692310573).

1011201001987 is a wasteful number, since it uses less digits than its factorization.

1011201001987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313745573.

The product of its (nonzero) digits is 1008, while the sum is 31.

The spelling of 1011201001987 in words is "one trillion, eleven billion, two hundred one million, one thousand, nine hundred eighty-seven".